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| Number | Title | Issue Date |
| 7372398 | Electronic target position control at millimeter wave for hardware-in-the-loop applications An apparatus for use in controlling a simulated target position in a millimeter wave, hardware-in-the-loop system includes a pair of horns and a conditioning circuit. The conditioning circuit is capable of generating a pair of output millimeter wave signals, each to... | 05/13/2008 |
| 7327306 | RF system for tracking objects A system for tracking an object in space for position, comprises a transponder device connectable to the object. The transponder device has one or several transponder aerial(s) and a transponder circuit connected to the transponder aerial for receiving an RF signal ... | 02/05/2008 |
| 7292822 | Wireless communication system using surface acoustic wave (SAW) second harmonic techniques An IDT produces a SAW when excited by a single electrical pulse and can be fabricated to embody a code, which code provides for a passive autocorrelation of a SAW input to the IDT and thereby lends itself to further application as a signal generator in a communicati... | 11/06/2007 |
| 7289096 | Shift register and a display device using the same A shift register in which multiple stages are connected one after another to each other, the multiple stages having a first stage in which a start signal is coupled to an input terminal, the shift register sequentially outputting output signals of respective stages.... | 10/30/2007 |
| 7224308 | Identification and location system for personnel and vehicles A surveillance system is provided for surveillance of objects within a secure area. A surveillance sensor transmits surveillance signals to all objects within the secure area, the reflections of which are received back by the surveillance sensor to determine the loc... | 05/29/2007 |
| 7218273 | Method and device for boresighting an antenna on a moving platform using a moving target A technique for boresighting an antenna mounted on a moving platform is described. The technique uses a concurrently moving calibration target. Target navigation data and platform navigation data are used to compensate for movement of the target and the platform. Th... | 05/15/2007 |
| 7218304 | Shift register and a display device using the same A shift register in which multiple stages are connected one after another to each other, the multiple stages having a first stage in which a start signal is coupled to an input terminal, the shift register sequentially outputting output signals of respective stages.... | 05/15/2007 |
| 7209071 | System and method for distance measurement A system and method for performing distance measurement using wireless signals. A time of flight calculation is enabled by an interrogating device that transmits an interrogation signal to a responding device, which returns a synchronized signal back to the interrog... | 04/24/2007 |
| 7196654 | Vehicle positioning and tracking radar system A vehicle positioning and tracking radar system includes a rotating antenna with a pair of spatially separated transmit feeds for simultaneously transmitting a pair of frequency-modulated continuous-wave (FMCW) electromagnetic signals having a first polarisation and... | 03/27/2007 |
| 7180937 | Method for determining imbalance in a vector signal modulator A method of determining imbalance in a vector signal modulator. First and second channels of a vector signal modulator are stimulated with a multi-tone signal having a power versus frequency spectrum having numerous of frequencies. In response to the stimulation, an... | 02/20/2007 |
| 7164380 | Interrogator and goods management system adopting the same An interrogator with an antenna that allows information exchanges with multiple transponders in a shorter distance of communication, by securing an intensified and uniform electromagnetic energy concentrated on areas near antenna elements. The interrogator is furnis... | 01/16/2007 |
| 7121502 | Pseudo GPS aided multiple projectile bistatic guidance A guidance system for guiding each of several projectiles toward a moving target has a platform having a radar system for illuminating the target with a radar signal. Each projectile has a receiver for receiving the radar signal reflected from the target, a transpon... | 10/17/2006 |
| 7119736 | Transponder system and method for measurement of separation Separation determination systems for determining the separation between a base station and a transponder, whereby the base station includes an oscillating signal source, for generating a signal and a transmission device for broadcasting the signal. The transponder i... | 10/10/2006 |
| 7113130 | Method and system for determining location by implication Systems and methods for determining location by implication are described. A responsive environment includes a location determination method that operates in an area that is only partially instrumented with location-sensing devices. Some of the with location-sensing... | 09/26/2006 |
| 7106245 | Digital RF tag An RF tag is provided to communicate with an interrogating source in which the tag has programmability and flexibility to uplink data to multiple platforms. As such the RF tag functions as a miniature programmable transceiver capable of communicating with a pluralit... | 09/12/2006 |
| 7071866 | 2-d range hopping spread spectrum encoder/decoder system for RF tags An airborne radar interrogates tags on friendly ground vehicles, which when interrogated by a downlink signal from the radar, sends back a very low level uplink message signal that appears noise-like so as to avoid enemy detection and exploitation. This is achieved ... | 07/04/2006 |
| 7030805 | Methods and system suppressing clutter in a gain-block, radar-responsive tag system Methods and systems reduce clutter interference in a radar-responsive tag system. A radar transmits a series of linear-frequency-modulated pulses and receives echo pulses from nearby terrain and from radar-responsive tags that may be in the imaged scene. Tags in the... | 04/18/2006 |
| 7015856 | Device and method for SPR detection in a Mode-S transponder A Mode-S transponder is provided for detecting synchronization phase reversal (SPR) signals. The transponder includes a receiver for receiving a Mode-S signal that contains a P6 pulse having a Mode-S data segment and an SPR signal therein. The transponder also inclu... | 03/21/2006 |
| 6985103 | Passive airborne collision warning device and method A passive airborne mounted collision warning system suitable for light aircraft that enables an observer aircraft to determine the position of a nearby transponder-equipped target aircraft. The transponder-equipped target aircraft transmits replies responsive to int... | 01/10/2006 |
| 6944544 | Adaptive vehicle safety system for collision compatibility A safety system for a host vehicle includes a pre-crash sensing system generating host vehicle dynamics data, a target vehicle threat assessment, and target vehicle bumper or doorsill location data. A ride-height, Dynamic State Self-Turning (DSST) controller generat... | 09/13/2005 |
| 6861971 | Transponder having high phase stability, particularly for synthetic aperture radar, or sar, systems A transceiver or transponder particularly for synthetic aperture radar, or SAR, systems, operating in a frequency band having a central frequency, the transponder comprising a receiver (1) and a transmitter (2) both thermally stable and made by microst... | 03/01/2005 |
| 6842138 | Target designation system A target designation system for indicating a target to be destroyed by remotely guided ordnance comprising a receiver arranged to produce a receiver output signal in response to an incident electromagnetic signal from an attack aircraft. An auto-switch is connected ... | 01/11/2005 |
| 6825794 | Wireless communication system using surface acoustic wave (SAW) second harmonic techniques SAW devices such as interdigital transducers (IDTs) have been widely used in RADAR applications and as filters. An IDT produces a SAW when excited by a single electrical pulse and can be fabricated to embody a code, which code provides for a passive autocorrelation ... | 11/30/2004 |
| 6825795 | Transponder lock A transponder lock provides allows an aircraft transponder to continue transmitting an alerting code for the duration of an emergency. The transponder lock thereby enables the aircraft transponder to continue to provide crucial information to ground tracking station... | 11/30/2004 |
| 6791489 | Radio tag for LFM radar An RFID system using encoded digital information utilizing pulsed linear frequency modulation (LFM). The LFM waveform is sent from an aircraft or satellite and is received by a transponder. The LFM waveform is demodulated using both, an AM and an FM receiver. The de... | 09/14/2004 |
| 6778128 | Method of locating underground utility lines and an underground utility line A method of locating an underground utility line. A first step involves securing transponders along a length of an underground utility line at regular spaced intervals. A second step involves interrogating the transponders to receive transponder signals. A third ste... | 08/17/2004 |
| 6768465 | Low probability of intercept (LPI) millimeter wave beacon A millimeter wave beacon includes a millimeter wave transmitter that produces at least one signal and plurality of antennas, coupled to the millimeter wave transmitter, that each emit millimeter wave radiation in response to the at least one signal. In one embodimen... | 07/27/2004 |
| 6762710 | Target designation system A target designation system for indicating a target to be destroyed by remotely guided ordnance comprising a receiver arranged to produce a receiver output signal in response to an incident electromagnetic signal from an attack aircraft. An auto-switch is connected ... | 07/13/2004 |
| 6747594 | Calibration of differential frequency-dependent characteristics of a radio communications system A method and apparatus are provided that determine a frequency dependent calibration vector for a set of transmit or receive chains of a radio communications system using only differential phase and amplitude between the transmit chains and the receive chains, respe... | 06/08/2004 |
| 6745008 | Multi-frequency communication system and method A multi-frequency RFID remote communication system is provided that includes a plurality of RFID tags configured to receive a first signal and to return a second signal, the second signal having a first frequency component and a second frequency component, the secon... | 06/01/2004 |
| 6693581 | Device for transmitting data in a motor vehicle A device for data transmission in a motor vehicle and/or from a motor vehicle in its vicinity includes a first transceiver unit in or on the motor vehicle and a second transceiver unit. which is provided in at least one transponder unit whose spatial posi... | 02/17/2004 |
| 6650277 | Target designation system A target designation system for indicating a target to be destroyed by remotely guided ordnance comprises a receiver arranged to produce a receiver output signal in response to an incident electromagnetic signal from an attack aircraft. A switch is connec... | 11/18/2003 |
| 6630900 | Process for carrying out a non-contact remote interrogation The invention relates to a system suitable for a remote interrogation of passive transponders using chirp signals for interrogation. The transponder preferably has an encoding unit (11), a calibrating unit (12) and a measuring unit (13) each with a plural... | 10/07/2003 |
| 6614385 | Police activity transponder utilizing a vehicle interface A police activity transponder utilizes data available through a vehicle on-board diagnostic system or a intelligent vehicle data bus to adjust the sensitivity of the police activity transponder to law enforcement signals based on speed data. A police acti... | 09/02/2003 |
| 6611224 | Backscatter transponder interrogation device A backscatter transponder interrogator, comprising a transmitter, emitting an interrogation signal for interacting with a backscatter transponder within an interrogation field, a plurality of antennas, each having a different and complementary property, s... | 08/26/2003 |
| 6587069 | Distributed power amplifier architecture for TCAS transmitter A transmitter and method for transmitting transponder or TCAS signals uses linear amplification to save on circuit component weight, cost and size while enabling precise amplification and control of the transmitted signal.... | 07/01/2003 |
| 6570527 | Calibration of differential frequency-dependent characteristics of a radio communications system A method and apparatus are provided that determine a frequency dependent calibration vector for a set of transmit or receive chains of a radio communications system using only differential phase and amplitude between the transmit chains and the receive ch... | 05/27/2003 |
| 6567038 | Tracking system for sports A cooperative tracking system designed to track multiple cooperative targets within a given field in real time with high precision and high update rate comprises a microwave transmitter and two receivers with each target being provided with one or more co... | 05/20/2003 |
| 6529156 | Self calibration of transponder apparatus A method and apparatus is provided for remotely and constantly calibrating a transponder by using the ring around phenomenon. A number of different time varying physical quantities, such as for example temperature, signal level, noise, transmission line f... | 03/04/2003 |
| 6529154 | Method and apparatus for reading two dimensional identification symbols using radar techniques A method and apparatus are provided for sensing two-dimensional identification marks provided on a substrate or embedded within a substrate below a surface of the substrate. Micropower impulse radar is used to transmit a high risetime, short duration puls... | 03/04/2003 |
